In my opinion, this is not an economical way to get more water; ____, it is very expensive.
_____ her mother had come, her face lit up.
The wallet was returned to him without anything _____.
I was deep in thought, so I didn't notice _____.
Did you hear the sound like that of a door _____?
Who could have imagined such a sweet-tempered girl as Jane _____ such a thing!